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Check if a String contains numbers Java
...t "123abc", the method above will return 123.
For "abc1000def", 1000.
For "555abc45", 555.
For "abc", will return an empty string.
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Using scp to copy a file to Amazon EC2 instance?
...e:
scp -i /path/to/whatever.pem /users/me/path-to-file ec2-user@ec2-55-55-555-555.compute-1.amazonaws.com:~
Few notes for beginning:
Note the spaces between the three parameters given after the -i
scp stands for secure copy protocol. Knowing the words makes it easier to remember the command.
-i...
Safely turning a JSON string into an object
...se()":
var jsontext = '{"firstname":"Jesper","surname":"Aaberg","phone":["555-0100","555-0120"]}';
var contact = JSON.parse(jsontext);
and reversing it:
var str = JSON.stringify(arr);
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When to Redis? When to MongoDB? [closed]
...{
_id: 0x194f38dc491a,
Name: "John Smith",
PhoneNumber:
Home: "555 999-1234",
Work: "555 999-9876",
Mobile: "555 634-5789"
Accounts:
- "379-1111"
- "379-2574"
- "414-6731"
}
The above document has a key, PhoneNumber.Mobile, which has value 555 634-5789. You can s...
How to select rows from a DataFrame based on column values?
...1.038989 1.219233 1.037020 1.000000
query 4.997304 4.765554 5.934096 4.500559 2.997924 2.397013 1.680447 1.398190
xs_label 4.124597 4.272363 5.596152 4.295331 4.676591 5.710680 6.032809 8.950255
mask_with_isin 1.674055 1.679935 1.847972 1.72418...
How to use mongoimport to import csv
...ddress,City,State,ZIP
Jane Doe,123 Main St,Whereverville,CA,90210
John Doe,555 Broadway Ave,New York,NY,10010
ctrl-d
$ mongoimport -d mydb -c things --type csv --file locations.csv --headerline
connected to: 127.0.0.1
imported 3 objects
$ mongo
MongoDB shell version: 1.7.3
connecting to: test
> ...
How to add texture to fill colors in ggplot2
...s dictate height of horizontal line. Outer: vertical edge lines.
x6 = c(.555,.555,.88,.88), # 1st 2 values dictate starting point of line. 2nd 2 dictate width. Each whole = one background grid
y6 = c(6,6,20,20),# inner 2 values dictate height of horizontal line. Outer: vertical edge lines.
x7 ...
技术人员如何创业《四》- 打造超强执行力团队 - 资讯 - 清泛网 - 专注C/C++...
...具备的，在大公司换一个岗位很难，在小公司就不存在，哪里需要就在哪里革命，当然这个也会考虑大家的兴趣。只要能够创造出价值就行，以前在大公司只能做某一方面的技术，在创业型公司不只接触的技术面很多，还可以学...
Convert object string to JSON
...9.aspx
var jsontext = '{"firstname":"Jesper","surname":"Aaberg","phone":["555-0100","555-0120"]}';
var contact = JSON.parse(jsontext);
and reverse
var str = JSON.stringify(arr);
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How do I convert this list of dictionaries to a csv file?
...nswered Apr 19 '18 at 3:35
jitsm555jitsm555
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